/* ═══════════════════════════════════════════════════════════
   ACTAtek Knowledge Center — Design System
   Dark premium theme · Electric blue/cyan palette
═══════════════════════════════════════════════════════════ */

/* ── Tokens ──────────────────────────────────────────────── */
:root {
  --bg-base: #080d14;
  --bg-surface: #0e1521;
  --bg-card: #111c2d;
  --bg-card-hover: #162335;
  --bg-alt: #0b1320;

  --accent-primary: #00b4d8;
  --accent-secondary: #0077b6;
  --accent-glow: #00b4d855;
  --accent-cyan: #48cae4;
  --accent-teal: #0096b7;
  --accent-green: #22c55e;
  --accent-amber: #f59e0b;
  --accent-purple: #a78bfa;
  --accent-red: #ef4444;

  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #00b4d8;

  --border: #1e2d42;
  --border-accent: #00b4d833;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 30px rgba(0,180,216,0.15);

  --topbar-h: 68px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 20px);
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 15px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--accent-secondary); border-radius: 3px; }

/* ── Typography ─────────────────────────────────────────── */
h1,h2,h3,h4,h5 { line-height: 1.25; font-weight: 700; }
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background: rgba(0,180,216,0.1);
  color: var(--accent-cyan);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ── Container ───────────────────────────────────────────── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ══════════════════════════════════════════════════════════
   TOPBAR
══════════════════════════════════════════════════════════ */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  z-index: 100;
  background: rgba(8,13,20,0.7);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}
.topbar.scrolled {
  background: rgba(8,13,20,0.95);
  box-shadow: var(--shadow-md);
}
.topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  transition: opacity var(--transition);
}
.logo:hover { opacity: 0.85; }
.logo-mark {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}
.logo-accent { color: var(--accent-primary); }
.logo-divider {
  width: 1px;
  height: 22px;
  background: var(--border);
}
.logo-sub {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

/* Search btn */
.search-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
  flex-shrink: 0;
}
.search-btn:hover {
  background: rgba(0,180,216,0.1);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ══════════════════════════════════════════════════════════
   SEARCH OVERLAY
══════════════════════════════════════════════════════════ */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(8,13,20,0.9);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 120px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.search-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.search-container {
  width: 100%;
  max-width: 680px;
  padding: 0 24px;
}
.search-close {
  position: fixed;
  top: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--text-secondary);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.search-close:hover { background: rgba(255,255,255,0.15); color: var(--text-primary); }

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  box-shadow: var(--shadow-glow);
}
.search-input-wrap svg { color: var(--accent-primary); flex-shrink: 0; }
#search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-family: inherit;
}
#search-input::placeholder { color: var(--text-muted); }

.search-results {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.search-result-item {
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}
.search-result-item:hover {
  border-color: var(--accent-primary);
  background: var(--bg-card-hover);
}
.search-result-item h5 { font-size: 0.9rem; color: var(--text-primary); }
.search-result-item p { font-size: 0.8rem; color: var(--text-secondary); margin-top: 2px; }

/* ══════════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-alt);
}
.hero-container {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(420px, 1.1fr);
  gap: 48px;
  align-items: center;
  padding-top: calc(var(--topbar-h) + 40px);
  padding-bottom: 60px;
  width: 100%;
}
.hero-copy {
  max-width: 720px;
  min-width: 0;
}
.hero-copy .eyebrow {
  margin: 0 0 10px;
  color: var(--accent-cyan);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero-copy .hero-title {
  margin: 0 0 20px;
  color: var(--text-primary);
  font-size: clamp(2.25rem, 5.5vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -1.5px;
  text-align: left;
  animation: fadeSlideDown 0.8s 0.1s both;
}
.hero-copy .hero-lede {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.65;
  margin: 22px 0 32px;
  max-width: 650px;
  animation: fadeSlideDown 0.8s 0.2s both;
}
.hero-copy .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 30px 0;
  justify-content: flex-start;
  animation: fadeSlideDown 0.8s 0.3s both;
}
.hero-stats-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 720px;
  margin: 0;
  padding: 0;
  animation: fadeSlideDown 0.8s 0.4s both;
}
.hero-stats-list div {
  min-height: 110px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  transition: all var(--transition);
}
.hero-stats-list div:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.hero-stats-list dt {
  color: var(--accent-cyan);
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 4px;
}
.hero-stats-list dd {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.4;
}
.hero-visual {
  margin: 0;
  min-width: 0;
  animation: fadeSlideDown 0.8s 0.2s both;
}
.hero-visual img {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transition: transform var(--transition);
}
.hero-visual img:hover {
  transform: scale(1.01);
}
@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ══════════════════════════════════════════════════════════
   BUTTONS
══════════════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-teal));
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,180,216,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,180,216,0.5);
}
.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
}
.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}
.btn-outline:hover {
  background: rgba(0,180,216,0.1);
}
.btn-sm {
  padding: 9px 18px;
  font-size: 0.82rem;
}

/* ══════════════════════════════════════════════════════════
   QUICK LINKS
══════════════════════════════════════════════════════════ */
.quicklinks {
  padding: 48px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.quicklinks-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.ql-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  cursor: pointer;
}
.ql-card:hover {
  border-color: var(--accent-primary);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.ql-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(0,180,216,0.1);
  border: 1px solid rgba(0,180,216,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.ql-icon svg { width: 20px; height: 20px; color: var(--accent-primary); }
.ql-text { flex: 1; min-width: 0; }
.ql-title { display: block; font-size: 0.875rem; font-weight: 600; }
.ql-desc { display: block; font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.ql-arrow { width: 16px; height: 16px; color: var(--text-muted); flex-shrink: 0; transition: transform var(--transition); }
.ql-card:hover .ql-arrow { transform: translateX(4px); color: var(--accent-primary); }

/* ══════════════════════════════════════════════════════════
   SECTIONS
══════════════════════════════════════════════════════════ */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  background: rgba(0,180,216,0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(0,180,216,0.25);
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -1px;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}
.sub-section-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 56px 0 28px;
  color: var(--text-primary);
}

/* ══════════════════════════════════════════════════════════
   PRODUCT FEATURE (flagship)
══════════════════════════════════════════════════════════ */
.product-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 72px;
  padding: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}
.product-feature::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan), transparent);
}

.product-feature-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-img {
  width: 100%;
  max-width: 360px;
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 80px rgba(0,0,0,0.6), var(--shadow-glow);
  animation: float 5s ease-in-out infinite;
}
.product-badge-overlay {
  position: absolute;
  bottom: 16px;
  right: 0;
  background: rgba(8,13,20,0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.product-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent-primary);
  border: 1px solid rgba(0,180,216,0.3);
  border-radius: 999px;
  margin-bottom: 14px;
}
.product-title {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}
.product-desc {
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.7;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 24px;
}
.spec-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}
.spec-label { color: var(--text-muted); }
.spec-val { font-weight: 600; color: var(--text-primary); }

.product-creds {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.cred-chip {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(0,180,216,0.08);
  border: 1px solid rgba(0,180,216,0.2);
  color: var(--accent-cyan);
}

/* ══════════════════════════════════════════════════════════
   PRODUCT CARDS GRID
══════════════════════════════════════════════════════════ */
.product-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.product-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.product-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.product-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(0,180,216,0.1);
  border: 1px solid rgba(0,180,216,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-card-icon svg { width: 22px; height: 22px; color: var(--accent-primary); }
.product-card-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 999px;
}
.product-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.product-card-desc {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.65;
  margin-bottom: 18px;
}
.product-card-specs {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}
.product-card-specs li {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-left: 14px;
  position: relative;
}
.product-card-specs li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: 700;
}
.product-card-specs li strong { color: var(--text-primary); }

/* ══════════════════════════════════════════════════════════
   DEPLOY CARDS
══════════════════════════════════════════════════════════ */
.deploy-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 56px;
}
.deploy-card {
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.deploy-card:hover { border-color: var(--accent-secondary); box-shadow: var(--shadow-glow); }
.deploy-card-saas {
  border-color: rgba(0,180,216,0.3);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0,180,216,0.05) 100%);
}
.deploy-card-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.deploy-card-top svg { width: 28px; height: 28px; color: var(--accent-primary); }
.deploy-card-top span { font-size: 1.2rem; font-weight: 700; }
.deploy-card p { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.7; }
.deploy-card ul { display: flex; flex-direction: column; gap: 8px; }
.deploy-card ul li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.deploy-card ul li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  flex-shrink: 0;
}

/* ══════════════════════════════════════════════════════════
   MODULES GRID
══════════════════════════════════════════════════════════ */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.module-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.module-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.module-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0,180,216,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.module-icon svg { width: 20px; height: 20px; color: var(--accent-primary); }
.module-card h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.module-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; }

/* ══════════════════════════════════════════════════════════
   SOLUTIONS TABS
══════════════════════════════════════════════════════════ */
.solutions-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}
.sol-tab {
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: all var(--transition);
  border-bottom: 2px solid transparent;
  position: relative;
  bottom: -1px;
}
.sol-tab:hover { color: var(--text-secondary); }
.sol-tab.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
  background: rgba(0,180,216,0.05);
}

.sol-panel { display: none; }
.sol-panel.active { display: block; }

.sol-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0 var(--radius-lg) var(--radius-lg);
  padding: 40px;
}
.sol-content h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.sol-content > p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.sol-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.sol-feat {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.sol-feat-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0,180,216,0.15);
  color: var(--accent-primary);
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.sol-feat div {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.sol-feat strong { color: var(--text-primary); }

/* ══════════════════════════════════════════════════════════
   INSTALLATION
══════════════════════════════════════════════════════════ */
.install-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.install-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.install-card:hover { border-color: var(--accent-secondary); }
.install-card-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--border);
  margin-bottom: 12px;
  font-family: 'JetBrains Mono', monospace;
}
.install-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.install-steps {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: decimal;
}
.install-steps li { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; }
.install-steps li strong { color: var(--text-primary); }
.install-steps-ul { list-style: none; padding: 0; }
.install-steps-ul li::before { content: none; }
.install-steps-ul li {
  padding-left: 0;
  border-left: 2px solid var(--border);
  padding-left: 14px;
  margin-bottom: 10px;
}

.wiring-options { display: flex; flex-direction: column; gap: 12px; }
.wiring-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.wiring-badge {
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
}
.wiring-green { background: rgba(34,197,94,0.15); color: var(--accent-green); border: 1px solid rgba(34,197,94,0.3); }
.wiring-red { background: rgba(239,68,68,0.12); color: var(--accent-red); border: 1px solid rgba(239,68,68,0.3); }
.wiring-blue { background: rgba(0,180,216,0.12); color: var(--accent-primary); border: 1px solid rgba(0,180,216,0.3); }
.wiring-purple { background: rgba(167,139,250,0.12); color: var(--accent-purple); border: 1px solid rgba(167,139,250,0.3); }

.io-table-wrap { overflow-x: auto; }
.io-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.io-table th, .io-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.io-table th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.io-table td:first-child { color: var(--accent-cyan); font-family: 'JetBrains Mono', monospace; }
.io-table td:last-child { color: var(--text-secondary); }
.io-table tr:last-child td { border-bottom: none; }
.io-table tr:hover td { background: rgba(255,255,255,0.02); }

.install-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 10px 14px;
  background: rgba(0,180,216,0.06);
  border: 1px solid rgba(0,180,216,0.2);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--accent-cyan);
}
.install-card p { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.65; }
.install-card p strong { color: var(--text-primary); }

.deploy-tiers {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.deploy-tier {
  padding: 10px 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent-primary);
}
.deploy-tier strong { color: var(--text-primary); }

/* ══════════════════════════════════════════════════════════
   SECURITY
══════════════════════════════════════════════════════════ */
.security-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.security-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.security-card:hover { border-color: var(--accent-primary); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.security-card-highlight {
  background: linear-gradient(135deg, rgba(0,180,216,0.08) 0%, var(--bg-card) 100%);
  border-color: rgba(0,180,216,0.3);
  grid-column: span 1;
}
.security-card-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  background: rgba(0,180,216,0.1);
  border: 1px solid rgba(0,180,216,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.security-card-icon svg { width: 22px; height: 22px; color: var(--accent-primary); }
.security-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.security-card p { font-size: 0.83rem; color: var(--text-secondary); line-height: 1.65; }
.security-card-note {
  display: inline-block;
  margin-top: 14px;
  padding: 4px 12px;
  background: rgba(0,180,216,0.1);
  border: 1px solid rgba(0,180,216,0.25);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

/* ══════════════════════════════════════════════════════════
   INTEGRATION
══════════════════════════════════════════════════════════ */
.api-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
.api-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition);
}
.api-card:hover { border-color: var(--accent-primary); }
.api-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}
.api-badge {
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 1px;
  background: rgba(0,180,216,0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(0,180,216,0.3);
}
.api-badge-green {
  background: rgba(34,197,94,0.1);
  color: var(--accent-green);
  border-color: rgba(34,197,94,0.25);
}
.api-card h4 { font-size: 1.1rem; font-weight: 700; }
.api-card p { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 16px; }

.api-endpoint {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  padding: 10px 14px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  margin-bottom: 16px;
  overflow-x: auto;
  white-space: nowrap;
}
.api-features { display: flex; flex-direction: column; gap: 8px; }
.api-features li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.api-features li::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-primary);
  flex-shrink: 0;
}

.field-table-wrap { overflow-x: auto; margin-bottom: 40px; }
.field-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
}
.field-table th, .field-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.field-table th {
  background: rgba(0,180,216,0.05);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}
.field-table td:last-child { color: var(--text-secondary); }
.field-table tr:last-child td { border-bottom: none; }
.field-table tr:hover td { background: rgba(255,255,255,0.02); }

.integrations-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.int-item {
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  transition: all var(--transition);
}
.int-item:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(0,180,216,0.05);
}

/* ══════════════════════════════════════════════════════════
   MOBILE APP
══════════════════════════════════════════════════════════ */
.mobile-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
.mobile-feature {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
}
.mobile-feature:hover { border-color: var(--accent-primary); transform: translateY(-3px); }
.mob-icon { font-size: 2rem; margin-bottom: 14px; }
.mobile-feature h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.mobile-feature p { font-size: 0.82rem; color: var(--text-secondary); }

.mobile-req {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.req-item { font-size: 0.85rem; color: var(--text-secondary); }
.req-item strong { color: var(--text-primary); }

/* ══════════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════════ */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  margin-bottom: 48px;
}
.footer-brand .logo-mark { font-size: 1.4rem; display: block; margin-bottom: 12px; }
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); margin-top: 8px; line-height: 1.6; }
.footer-company { margin-top: 12px !important; }
.footer-company strong { color: var(--text-secondary); }

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.footer-col h5 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent-primary); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-muted);
}
.footer-conf {
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(239,68,68,0.1);
  color: var(--accent-red);
  border: 1px solid rgba(239,68,68,0.25);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 1px;
}

/* ══════════════════════════════════════════════════════════
   DIAGRAMS & SHOWCASES
══════════════════════════════════════════════════════════ */
.diagram-showcase {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 48px;
  text-align: center;
  box-shadow: var(--shadow-md);
}
.diagram-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.diagram-legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.deploy-showcase {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 40px;
  align-items: center;
  margin-top: 48px;
}
.deploy-showcase-text h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.deploy-showcase-text p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}
.deploy-showcase-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.deploy-showcase-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 20px;
  list-style: none;
}
.deploy-showcase-list li::before {
  content: "■";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-size: 0.7rem;
  top: 1px;
}
.deploy-showcase-img img {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* Solutions layout with diagrams */
.sol-panel.active {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 32px;
  align-items: center;
}
.sol-diagram-wrap {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sol-diagram-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}

/* Product card images */
.product-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  border: 1px solid var(--border);
  background: var(--bg-base);
}

/* Installation diagrams */
.install-card-wide {
  grid-column: span 2;
}
.install-diagram-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 16px 0;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

/* Responsive Overrides */
@media (max-width: 900px) {
  .deploy-showcase {
    grid-template-columns: 1fr;
  }
  .sol-panel.active {
    grid-template-columns: 1fr;
  }
  .install-card-wide {
    grid-column: span 1;
  }
}

/* ══════════════════════════════════════════════════════════
   SCROLL ANIMATION
══════════════════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s, transform 0.6s;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .modules-grid { grid-template-columns: repeat(2, 1fr); }
  .quicklinks-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav { display: none; }
  .search-btn { display: none; }
  .hamburger { display: flex; }
  .topbar-inner { gap: 16px; }

  .product-feature { grid-template-columns: 1fr; }
  .product-cards-grid { grid-template-columns: 1fr; }
  .deploy-cards { grid-template-columns: 1fr; }
  .security-grid { grid-template-columns: 1fr 1fr; }
  .api-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: calc(var(--topbar-h) + 20px);
    text-align: center;
  }
  .hero-copy {
    max-width: 100%;
    margin: 0 auto;
  }
  .hero-copy .hero-title {
    text-align: center;
  }
  .hero-copy .hero-lede {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-copy .hero-actions {
    justify-content: center;
  }

  .nav.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--topbar-h);
    left: 0; right: 0;
    background: rgba(8,13,20,0.97);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    z-index: 99;
  }

  .install-grid { grid-template-columns: 1fr 1fr; }
  .sol-features { grid-template-columns: 1fr; }
  .mobile-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .hero-stats-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .hero-stats-list div {
    min-height: auto;
  }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-sep { width: 60px; height: 1px; }
  .quicklinks-grid { grid-template-columns: 1fr; }
  .security-grid { grid-template-columns: 1fr; }
  .install-grid { grid-template-columns: 1fr; }
  .modules-grid { grid-template-columns: 1fr; }
  .mobile-grid { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
  .spec-grid { grid-template-columns: 1fr; }
}